Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a69e240b5a266767d93edd40a4099b9a8feb5fce46055f6d1eb8f5cb1fe1c2e1' 
  AND token = '1Ym3DSRFtR8l0eqzJCSdqsI5Tn5nzFPwjkC2oI1MfvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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