Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa140851f2b6e2dcc90e6735caa2d14d477e505d0fec252eff8d67fa00dd0128' 
  AND token = '6oiwRDDRbUVTf48E3uFNicxjOwLe7uH4t4oK8BsGfeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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