Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af6462756bb188fd3290f96e5c4b49b31f995deadfcd09ffaad837aa33d56f91' 
  AND token = 'Lr3lFP/mKpYHBkbL3mba9n3PJ2URVFPPheW3FcC5l3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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