Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70116d5f644102aa6a1011a63c8a72b520aa6e51b35c186a2a876f2975a4fa80' 
  AND token = 'mJdzLRGtKPVpx7YPKyJKh9Y/EM4KVr4AXmeAamjQm3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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