Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a886097d2a710e0a2e5a1629dd7ae2447b554e70fab16cd65beceeb073ab23ec' 
  AND token = 'LNvfq3Gh2rO1FT1xDFvXzUV07I+GhLvhNT8oOmpHxGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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