Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bbbd788f5019bf6ed7281d82e5af94234770ca8675aa3ab748d4cc5ac613853' 
  AND token = 'XRrJu0qzbjNTLNuVz16w20IZqRFm2bW+alzxAPRD1Eg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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