Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '542c575b44c3a0e4d27918049e921506521ec44182e164433914ac6f3c4eb85a' 
  AND token = 'yATBZplUB04vcrFJl1/H1QAL4hu/A327etrGgYPLWo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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