Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0c13aaccf7587f6594acd42ad6e25c8cc55719fe9fc5dbfa0e4ffb1dd16c0cc' 
  AND token = '1Ecye4ATB2/BEIkloT9KCoNMfD6In2zl6v1nbD8vDcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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