Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38c21aefecd6c329de3a4816f4f1eb54cc8902965407b14127f3069f4f8c75d8' 
  AND token = 'kF35KeptQyT1uDxdgW/WZ/KH5sDgcqfKMg/cMvyd7hI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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