Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '549e8cdfc2079e5ed6429c1be70be813090186c7872d69c20eaabcff5aa8beec' 
  AND token = '2m+lHlnYHzKJyFMJw/Oele2k3YCnGu2Zrmypvs3FyCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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