Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c79ed537c62d7ef26ec26ca6b817c86ba0ed18eba49b6311722d7e107175d1bb' 
  AND token = 'cpRC8+Ee+kYQqOf5sxwz2XOTiD4Zlzff6YR2F/rz9SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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