Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f4fd46dec4195ac40d8cb4345660a5345d19d0c123e9febd747899282544582' 
  AND token = 'CBc0gxo2rtwHgCkUy4cRLVyEqvNxX8M/t+in7gkSHi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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