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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4993793ad015153416d908db4a32cf4830f5450c59d071abf05fba4fccdd24b9' 
  AND token = 'H9ySPd1aca+2la/wbqCwaETEgU7V2C549pzKgZNEF9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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