Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6371210e3bc44c0d89dbbcd213e6e8fdcf7d4e817c589fa9818d01361e2bcd0d' 
  AND token = 'VL/EUeIRMHg1qChKCKEisdxB8weWZqpQsx5SdhHxiQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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