Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '055d3acc3b77d849c598ae63c26d760ef86da97383f6bdd97bd692f824b8a423' 
  AND token = '5sBsrObDKjt2gAuOaDAVAByCNSw+sroXlueKPR/KnDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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