Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3f371803502a0df56e3ab3e34a3adcc7d167642c6313e50bda0e27e2be56f34' 
  AND token = 'DpJWSuGJLyM6Iio8r8/vSi9/CTDeCIh8QRT6XF/WkLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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