Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d13fecc226bcc87b9d2ebe610c19e83a956405ed54c8b504a9ad9e419e7ca31' 
  AND token = 'lpM4BUjZmkpo8uW87jemkiBD7LVRDAkGkKNmi/sfXL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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