Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c765b263468bdcf0899da492036e1f3938daf51f3aea83ca2dada16cb03449fa' 
  AND token = '9IoeUtXfym7vLaX2q4h0H2BbwjJqdaSoC6PnqYzWY0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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