Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '458689021e1d53665054e1ba01cabf4705c7fe05dd7cddcdd2a5a127cd10ca2b' 
  AND token = 'mwu2a06NcqPiMP98iwm8vopSPRk73GZz3ed8ifzqv1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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