Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '18524eccd3a9471c6c1e8a2b28ff2f88ac3bc52e932147e7ae8c0194787c61ba' 
  AND token = 'qyiT+L/f0W6IdJRSAX3apXBvTlGfc4R3YW2AGrhTB/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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