Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eacd80f6a30cdb2d80fefdc2fa05f497559e8c306c5376a473c9e2cf751370c' 
  AND token = 'ExUj2KgR363qLpN+QFNqX0tX+Nt3n4okt0yzU9R9iCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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