Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd5d9d189cf55962df0688cc699c80ceec604203123c8d3fb31c3a2c71f13d4f' 
  AND token = 'p4/vrBlXUgPUtmfAxRZaghAtKOc5bpC+ou6yjx20SIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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