Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54a164a3cc552ac1eedcc609dbd0e0eb11dca5b04457154d1a9103eb5152b3ae' 
  AND token = 'l47jtaodOB6MYRizRWMdCqJYARckPYSRcVeWnRdynrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}