Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff4a5fba84ae2f4c4d1e410710513d6689a2ba785ea9414074f94b4b471dfd93' 
  AND token = '8tMuwCqmWAMWbKcpvnp1LsO4JgV4BDRFvsUAaJGT6P4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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