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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd3664ebe8d410a9d31209ba2e279782074c77e5baef84e92b863bef52fcb24f' 
  AND token = 'pnuEgucYnI5drJziYBG4CBC4tRNEysWLj9AeO0cvUjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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