Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '213f1028b4f49d3a8e44edbd00c4b250681c279f7415cb270532c6177cdf71ca' 
  AND token = 'umxHeQRNP02z2y2qm2i4A8W8qsjAvy+Ufus98o3p438=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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