Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2a23e82a5e9016e092450a0aaf7ef96a6f83330e26198800c9cfb437d61a2ce' 
  AND token = 'i+lyOUlGSTzrKulfxNqLR0iGni34q5BmWpnWDMzpA6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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