Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2686059268cde1d923b080a8f0bdbd3c8432a1e3e2e907b67fa6b26d8b64afc' 
  AND token = 'stGTWZuEnUNPEcvom3HEJMNyd7xftv4Kz44VHf/i41w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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