Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfc0726f8537e630ca53a85938f63db10052e2402e941d318ca05213096fc3b2' 
  AND token = 'kONVSNBPDN5Iwrm7nILRZlTkCdMPOM0m5tDmSjdmRrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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