Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5543859bf3297fc66095eec6d617d78d9c80077e72e88ae680913a1c81e49ee6' 
  AND token = 'IWUsL1Jngbst9eTsHbMLixtS8F6VQUjE3rcDVFwwXI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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