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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a211a11c65c2ece80e7368aa028a140811bb41682dc0e72d451a47d90d6e16e' 
  AND token = 'ZOD5M/epPiurebow4nhn1a9QFQA0PFYxyI9OkJp3v+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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