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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a185d46c64359156e43f439d352fb0136ab8f7ce015a25b7f125e3ca088a0a5d' 
  AND token = 'E0p80GtkP+/luIbhkSdAZCLzOPwN9Fzu1chFVftJ8ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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