Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3813775358d1140efd01758f19ce38a83091d736269056320be3edc6b7bf5a88' 
  AND token = 'vcCPP0r6Ue63GuwQiygRc6fZkOBYg9YVZEX1XQPEMpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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