Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1c77a97783d8cf2c3072db1f5d2dcae44cf290da8369a2227b7a4ae081868db' 
  AND token = '8nDb2ryehMUrCMkRpJRoJ5xVHt+ssZL9d28uVg9cZww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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