Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fb06bb4dc298c8da7b7acd99d00db8000a74dfaee517028ef516a7904d363a7' 
  AND token = '8bBdvNPlb4PjPkR4sm9IMehjGPVzLItGimXDqvX8j8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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