Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa8a610ca4ce11102ec39d71794d50af8cdfcb93497f00590998d8935502210' 
  AND token = 'TZ8FUnAh3E7zs3BwjlTllQ+NW9+m+mC38NwzpRik73M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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