Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'affec9b7a8a1c9b964847e463c87f94fbde6bdb209e7dc1ffd1668c76a3e8a22' 
  AND token = 'R6jpttjM244Pfo/EJFF8my+c/qe5aWGYTTm3fOi6uE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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