Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a6a310a026fcbc49b6915142c3145f6b021378b1b17aec26f2dd813a8046afd' 
  AND token = '/eswht+Wg2XuumuzinUbVdBbG/kUMLCOQC3p0uF0SOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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