Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c52558d2dfb6e3d309dd08598a364b4f8cc401674b44abed1968f44831092c67' 
  AND token = 'v3DTenZCx1nkhYmPq1K5hS5d+o63GrEo0hEIlUHRE2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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