Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '175f301b4e8577dc96c8c76390c9ffb759f22e068803a3b0e2a5a5c7b7ff1265' 
  AND token = 'yLJSeGiIZ9vHpzuKezxyUl2u2+slvsxfJuD/qedf7lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}