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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06276f7761ac85f991f7cfc92a7d5b556bf3d804ad5bea1f6ead4ec35df84358' 
  AND token = 'dg9c7IQ7+NM1Tj4Wd0uNt8xyZRoheQE0eHY9TMn0SMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}