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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5468a923a353d912260808b473b555c026c531ec9c6e60a84f19bcfa5e2fb15b' 
  AND token = 'sJRsuuPcA8zVBxAnToASaMBC00zbWGuKU9TSD9fBmNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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