Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '989d331a3e2ca0d0e38d2c98b060c2855f52e691c69b7062b8fa252a4f0296ea' 
  AND token = 'OKR6cDsXLvJ2cVhsX4KUUkynSC2v2u63VzRRZahJOYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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