Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '493502fee04cff03426985d8abc9296f458dfad3898ab42cc4d6c8b490b0f773' 
  AND token = 'JiPAUWnV6yULo4rc16OzZG4jsLuYUkICR42c8MJ3naI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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