Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7743198d597623038f5064020506a0ead9e750fef569d044e86b0a808b2eed2a' 
  AND token = '+hoW+zIiiXLz7dwxqsJkkISokmuJdOwWNojRB7Xgh8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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