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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fd2b97e0f1850eaf2c7410eb7829bca9d9d68148992c7264dc51a0c7fdbb4a2' 
  AND token = '1IOBtsGmzUeFtKgQau0zjVApdlS0B9KIMs7pEHGnjXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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