Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52f5bb4914095c666043c39c221e1e22e676a62bcf4bc0f84d5a6c8bb420196c' 
  AND token = 'fl+0oB+rFodZFcnuRaEYW0ueKmbUs2Yqs+R5G2MfJcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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