Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c2152945ed6a1195a4f52c082da8f88addadc4a111cca9e43a0e50e0e6bc89a' 
  AND token = '4RrwYsomtyJqu579GE+zkLU+HZA25DomDhc8+/luE6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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