Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7a2c7f14819dfb056e644bcb09e47a5dd787884d31c8bc1aad8509b78400ad4' 
  AND token = 'D+zeLO7mkGFLZRD5jAOjJHduDRrn7pTQofBfnMyAlAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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