Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85fced2b6cd0088d5f514cd985c26a64e06392b015d79f9ee790cba37ec01280' 
  AND token = 'baSSaRS52KrMCEO7TiTiTkODi8mZO1QoOVQRC4sN85k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}