Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '02d5d70932f247637b5fd5560ebe3d16a2d2a8a5e635501a34fc5ee952b8fb19' 
  AND token = 'Q7wnBeIZeRwtMwIUo/Wu6+VNfjOIxjhFRnuH79bInpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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