Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa5b3c081f18fbe1d38a3e76afea9547acffb91a8a9d8eb67fdcfbc28973930e' 
  AND token = 'o+XGJU4AdLBVIthtAaXUz4zNr33l7cyzqlqhKePEKVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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