Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972c8f3e250544faba9891bc7e377bd2eaf85d83b512e0b7ed004a2d33cb5ecc' 
  AND token = 'jQLD3HP7u1AXZQ+OuIZsH9jxDJoexrAThTs1z/wH3BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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