Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '523d8da7b96475dd6a1af83d936628a9248e822e6ed77c46990a4f0e6ef04d8d' 
  AND token = 'OEWavaifZ3r0SZPoUPvNRykGGQj+elp9Wby5w356Ego=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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