Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecd092bc8e6c2aa60c7f7c41f7b701874be691d9882a62d192007f4a6e26d646' 
  AND token = 'ZjXNd4d28nlbYU64g3SWecTz1njC33AXRIP4AXlsuc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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