Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77aba03dcdfe6119a84572938847d6afb23a4e1730ca7cbbc4a6d23b63e2155e' 
  AND token = 'nxQcisNZbVVO9HFijnR4pndT48MXrpuH7x1KAApsp5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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