Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c8cb8f7e5c5e6f99cd1681df286a7353255823fe7db044f07ffcdf2380cb85f' 
  AND token = 'LU2Sh2KgQuboHKhUY4EA2U1Qm4nkjgyvK3m3slR9tV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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