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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54aa0a2f6d47f9a2b6233a028d19d6a68ecd4e2ffc18df944edb65d8bcb75f89' 
  AND token = 'pe7LNfNm4Sw7V7WIFGqJkT4uRPkjh8vr65T1G4V0XMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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