Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '270186db521d75bd6980f3daf11bab073fc6dc49b94de97ec236fefd76b510c6' 
  AND token = 'j2UpB1CmJNmpPfBDCzY2WkxFzejcZP95T8jl3+Ulmls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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